Question

Historically, the proportion of adults over the age of 24 who smoke has been .30. In recent years, much information has been published and aired on radio and TV that smoking is not good for one's health. A sample of 650 adults revealed only 23 percent of those sampled smoked.

Develop a 98 percent confidence interval for the proportion of adults who currently smoke. (Round your t-value to 2 decimal place and final answers to 3 decimal places.)

  Confidence interval is  up to  .

Would you agree that the proportion is less than 30 percent?

(Click to select)  No  Yes

Answer 1